atha kadācit kaścid vṛṣala-patir bhadra-kālyai puruṣa-paśum ālabhatāpatya-kāmaḥ
atha - thereafter; kadācit - at some time; kaścit - some; vṛṣala-patiḥ - the leader of śūdras engaged in plundering the property of others; bhadra-kālyai - unto the goddess known as Bhadra Kālī; puruṣa-paśum - an animal in the shape of a man; ālabhata - started to sacrifice; apatya-kāmaḥ - desiring a son.
Low-class men such as śūdras worship demigods like Goddess Kālī, or Bhadra Kālī, for the fulfillment of material desires. To this end, they sometimes kill a human being before the deity. They generally choose a person who is not very intelligent — in other words, an animal in the shape of a man.